You don't need to have a Lucidchart account or license in order to view a sheet if you're just a viewer. However, I found it frustrating when non-license holders created their accounts, which should only consist of creating a username and password, the setup process lead them to believe that they needed to give their credit card numbers to proceed. I have at least two colleagues who did put in their credit card information and then they forget to cancel the subscription, and they ended up getting charged for a license that they don't use. To me, the confusing setup for non-license holders is a barrier to entry. If you want new people to see this tool, the process shouldn't be that confusing to view a sheet for non-users. But as a user myself, it truly is perfect. For non-users, this is a pain point.